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Glossary
206 Avaya P460 Reference Guide
that defines the interface between two ATM switches that are both located in a
private network (P-NNI) or that are both located in a public network (public NNI).
Node
A point of interconnection to a network or a junction of two or more lines in a
network. A node can be a computer or some other device, such as a printer. Every
node has a unique network address.
NSAP
Network Service Access Point. An ISO-specified network address.
OID
Object Identifier. Used in SNMP to identify managed objects. In the SNMP
Manager/Agent Network Management Paradigm, each managed object must be
identified by a unique OID.
OSI
Open Systems Interconnection reference model. A model for network
communications consisting of seven layers that describe what happens when
computers communicate with one another.
OSPF
Open Shortest Path First. A routing protocol featuring least-cost routing, multipath
routing, and load balancing.
Out-of-Band
Transmission of auxiliary information, such as management messages, using
frequencies or channels outside the frequencies or channels normally used for
information transfer. Out-of-band signaling is often used for error reporting in
situations in which in-band signaling can be affected by whatever problems the
network might be experiencing.
Packet
Logical grouping of information that includes a header containing control
information and usually user data. Packets are most often used to refer to
application layer data units.
PING
Packet Internet Groper. Determines whether a specific IP address is accessible by
sending a packet to the specified address and waiting for a reply.
Plus Tagging
A proprietary Avaya tagging mechanism that enables extended VLAN capabilities.